The two collecting ducts that drain the lymphatic trunks are the

The lymphatic trunk trains the lymph fluid into two lymph ducts: The thoracic lymph duct and the right lymphatic duct. 

The thoracic lymph duct takes the lymph from the lower left halves of the body. It is the largest lymph vessel. It carries the lymph and chyle (emulsified fatty acids) back into the bloodstream. It drains lymph  into the circulatory system via the left brachiocephalic vein. 

The right lymphatic duct on the other hand gets lymph from the right and upper halves of the body. It drains lymph from the right upper limbs, right part of the thorax and the right half of the head and neck.